Senior Software Engineer

Become an EXpert as a Senior Software Engineer:

At EX Squared LATAM, we build transformative digital experiences for global brands. We’re looking for a Senior Software Engineer with deep expertise in Node.js for back-end development and Flutter for mobile applications to architect and deliver high-quality, scalable, and secure solutions. This hybrid role is ideal for a bilingual professional who thrives on tackling complex technical challenges, leading development efforts, and crafting seamless user experiences across web and mobile platforms.

📍 Hybrid model – You’ll work 1 day (Wednesday) per week from our office (San Rafael, Escazu).

🚀 What You’ll Do:

• Design, develop, and maintain scalable back-end services using Node.js and TypeScript.
• Architect, build, and optimize cross-platform mobile applications using Flutter and Dart.
• Implement robust API architectures (RESTful/GraphQL) and ensure seamless integration with mobile front ends.
• Build and maintain custom Flutter plugins, reusable components, and multi-package repositories (e.g., Melos).
• Optimize performance across server and mobile applications, ensuring scalability and responsiveness.
• Apply secure coding practices for both back-end and mobile environments, ensuring data protection and compliance.
• Deploy services using containerization (Docker/Kubernetes) to cloud platforms (AWS, Azure, or GCP).
• Collaborate with designers, PMs, QA engineers, and developers to deliver high-quality products.
• Participate in code reviews, mentor junior developers, and champion best practices.

🧠 What You’ll Bring

• Bilingual proficiency (English C1+ required).
• 5+ years of back-end development experience with Node.js, Express, and TypeScript.
• Strong knowledge of microservices, event-driven systems, and service-oriented architectures.
• Experience with messaging systems (RabbitMQ, Kafka, AWS SQS) and caching (Redis, Memcached).
• Skilled in SQL and NoSQL database design and optimization.
• Familiarity with observability tools (Prometheus, Grafana, Datadog) and CI/CD pipelines.
• 2+ years of Flutter/Dart (must have) development for production-ready apps.
• Expertise in state management solutions (Riverpod, BLoC, GetX) and mobile performance tuning.
• Experience with Firebase, GraphQL, and offline-first strategies.

💡 Nice to Have

• Advanced experience with orchestration tools beyond core requirements.
• Knowledge of mobile analytics and user behavior tracking.
• Familiarity with accessibility standards for mobile apps.
• Exposure to cross-platform development for web.

🌎 Why Join EX Squared?

At EX Squared LATAM, we don’t just build products—we build careers. You’ll join a multicultural, innovative team delivering high-impact solutions for global clients. Our culture values collaboration, continuous learning, and professional growth, ensuring that your career trajectory is as exciting as the projects you’ll work on.

💼 What We Offer

• Competitive salary in USD.
• Hybrid work model with 1 day per week in the office.
• Medical insurance 🏥.
• Flexible, inclusive, and collaborative work environment.
• Access to EX Squared University for continuous learning and certifications.
• A culture that celebrates creativity, ownership, and team success.